Severe gusts hitting speeds of as high as 155km/h (96mph) have caused nearly 90,000 households lacking electricity and forced officials to halt more than 100 flights, as reported by local media.
The winds are influencing the entire southern region and lower areas of the northern region, according to the national weather agency.
Officials in New Zealand have issued rare high-level wind alerts - the top caution category - in core zones encompassing Canterbury and Wellington.
Locals have been advised to avoid going outside, refrain from journeys, and make arrangements for more power and communication outages.
Widespread Damage and Emergency Measures
The electricity loss is primarily influencing homes predominantly in the South Island, though officials report that the electricity supply was being restored progressively.
Domestic outlets have indicated that in various locations homes have lost their roofs, and utility poles and vegetation have been toppled by the gales.
Across Wellington, a man was fatally injured after being hit by a falling limb at a popular trail walking spot on Tuesday.
Meanwhile in Wellington, a female was pushed toward approaching vehicles on a street by a strong gust of wind, in a moment that was filmed in a viral dashcam video.
Flights entering and leaving the city have been suspended because of the winds, whereas some roads and libraries are not operating.
Meanwhile Canterbury officials have announced a state of emergency, to facilitate emergency management operations.
Strike Action Alongside Severe Weather
These intense gusts on Thursday come as many of educators, medical professionals and government employees take part in what has been called a "significant labor action", calling for improved salaries and workplace environments.
However the severe conditions has forced them to alter certain arrangements, with some outdoor rallies shifted to interior venues or called off.
Comparable winds are impacting the neighboring country, bringing a period of extreme heat to the nation's interior regions.
Officials have announced flame prohibitions for apprehension regarding forest fires.
